crecelius



(No Model.)

L. J. GREGELIUS.

LIFTING JACK.

mmg

Patented June 17, 1890.

me Nnmus PETERS c c UNITED STATES LOUIS J. OREOELIUS, OF ST. LOUIS,

WARREN, or

PATENT OFFICE.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 430,421, dated June 1'7, 1890.

Application filed April 14, 1890.

To all whom it may concern.-

St. Louis, in the State of Missouri, have invented a new and useful Improvement in Lifting-Jacks; and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention relates to lifting-jacks, and is designed as an improvement upon the form of jack shown in Patent No. 410,074, dated August 27, 1889, in which patent is shown a lifting-bar with a lifting; and holding grip, the said grip consisting of a clutch-box carrying a wedge or like gripping device with a loop operated upon by a handle or lever, the said loop being pivoted to the clutch-box and adapted to bear upon and apply pressure to the wedge or like device.

In the present invention is included the lifting-bar of Patent No. 383,710, dated May 29, 1888, which is provided with a tapering face or groove, or, if desired, the lifting-bar may have parallel sides, a clutch-box carrying the lifting-grip, and a second clutch-box carrying the holding-grip, with means for operating both grips, the one to lift the bar and the other to release the same. The improvements in the present case relate particularly to the clutch-boxes and grips carried thereby, as will be hereinafter particularly set forth and specifically claimed.

In the accompanying drawings, Figure 1 is a side elevation of a jack embodying my improvement with a part of the standard broken away to show the lower clutch-box. Fig. 2 is a front elevation of the standard with the lifting-bar partly shown and the clutch-box of the holdinggrip shown in dotted lines. Fig. 3 is a section on line x 00 of Fig. 1. Fig. 4 is a detail plan View of the gripping-loop. Fig. 5 is a section on line z z of Fig. 1. Fig. 6 is a plan view of the handle-socket. Fig. 7 is a section on line y y, Fig. 1.

The standard shown at A is of any ordinary or improved construction, while, as I have said, the lifting-bar B may be tapering or be provided with the usual cap a, having a serrated upper face and lifting-foot b at its lower end. The clutch-box carrying the lifting-grip is shown at O, this box being of approximately U shape in side elevation, rect- Serial No. 347,848. (No model.)

angular openings being formed in the upper and lower limbs c of the U, through which passes the lifting-bar, as shown in Fig. 5. The bottom of the clutch-box O rests normally on the upper end of the standard, as shown in Fig. 1. The clutch-box carries a grip which has a central cylindrical portion 0, with arms d,

extending at right angles to the part c and pass ing outside the line of the clutch-box. These arms (Z are curved, and their ends are adapted .to engage the ends of the lever D, as at e, this lever having'journals f, which have bearings in the offset g of the standard, as in Figs. 1 and 2. The curvature of the part c corresponds to the curvature of the clutch-box, which it neatly fits, as shown in Fig. 1; but in the front side of the part cit is notched, as shown at h, this notched portion being of equal width but greater depth than the channel in the lifting-bar, if the bar is formed with a channel. This notch provides a straight gripping-face. A clutch-block i is interposed between the gripping-loop and lifting-bar, as shown in Figs. 1 and 5, and thus when a downward pressure is applied to the lever I) the grip is turned in its bearings, acting as an eccentric or cam, forcing the clutch-block against the face of the lifting-bar. As the handle is raised the arms cl fall by gravity until the inner wall of the notch h is in a line parallel to the face of the clutch-block, and in this position there is no gripping action.

The clutch-box for the holding-grip is shown at E.

The clutch-bloclc is shown at z" and the gripping-loop at c. The releasing-lever is shown at in Fig. 1. This holding clutchbox is movable vertically within a chamber E in the standard, and the arms d of the holding-loop c' are arranged to bear upon the bottom of this chamber, and the block t" is interposed between the loop and the liftingbar. It will be seen that when the liftingbar isv raised by the action of the lifting-lever and clutch-box 0 its downward tendency under the weight will cause the holding clutchbox to move downwardly, and as the arms 61 bear upon the bottom of the chamber E the 'arms will be moved and the loop turned, causing the central cam part c to force the block against the lifting-bar, thus holding the same. In order to release the holding-grip to allow the lifting-bar to fall, a releasing-lever 7c is provided, the arms is of which are arranged to bear upon the under side of the clutch-box, and when the outer end of the lever is depressed the clutch-box will be raised and the lifting-bar released by the downward turning of the loop 0 and the consequent loosening of the block i.

It will be observed that both clutch-boxes have open sides and the gripping-loops are adapted to be seated by slipping them be- I tween the upper and lower branches 0 of the U-shaped boxes. They, together with the blocks 11 and 2", are easily removable when the lifting-bar is removed. The clutch-boxes are also removable and all these parts are locked in position by the insertion of the lifting-bar. This is also true of the lifting-lever, the journals f of which are inserted in the bearings g, which are open at one end. The bearing parts 0 c of the grips journal against the internally-rounded wall 0 of the clutch-boxes throughout the entire Width thereof, and thus a strong construction is provided.

I claim as my invention 1. In combination, the standard A, the lifting-bar B, a lifting-lever D, a clutch-box substantially U-shapedin side elevation having upper and lower limbs 0 perforated for receiving the lifting-bar, and a grip carried by said clutch-box, substantially as described.

2. In combination, the standard, the liftingbar, a lifting-lever, a clutch-box having a wall 0 with its interior rounded, and aturning grip carried by said box and seated against the said wall throughout the width thereof, substantially as described.

3. In combination, the standard, the lifting I bar, a lifting-lever, a clutch-box, a grip having a bearing and gripping part seated therein, and the arms cl, extending outside in position to be operated, the said lifting-lever bearing under the ends of the arms cl.

4. In combination, the standard, the liftingbar, the lifting-lever, the clutch-box, and grip, the said lever being removably j ournaled and retained in place by the lifting-bar, substantially as described.

5. In combination, the standard, the liftingbar, the lifting-lever and clutch-box, and a vertically-removable holding clutch-box with a releasing-lever acting directly upon said clutch-box, substantially as described.

6. In combination, the standard having a chamber E, the lifting-bar, the lifting-lever, the lifting-clutch box, the vertically-movable holding-clutch box within the chamber E,

the grip having arms d to bear upon the bottom of the chamber, and the releasing-lever to operate the clutch-box vertically, substantially as described.

7. In combination, a standard, a lifting-lever, a clutch-box, a lifting-bar having a channel, a grip having a cylindrical part0 to bear upon the face of the bar, and a notch h and a clutch-block in said notch bearing within the channel of the bar, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LOUIS J. CRECELIUS.

IVitnesses:

G. A. THOMPSON, HENRY G. GREENE. 

